挑战习题
1/5单选题
难度:

1.现有20 ℃ NaCl的饱和溶液100 g,欲改变溶液中溶质的质量分数,下列方法中正确的是
A 温度不变加入10 g NaCl晶体
B 温度不变蒸发掉10 g水
C 温度不变加入10 g水
D 温度不变取出10 g溶液
提示1:
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提示2:
5rq25ray5piv5Z2H5LiA55qE77yM5ZCE6YOo5YiG6YO955u45ZCM44CC5Y+W5Ye65LiA6YOo5YiG5rq25ray5a+55pys6Lqr55qE6LSo6YeP5YiG5pWw5rKh5pyJ5b2x5ZON44CC
正确答案:Qw==
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